21335073 has 8 divisors (see below), whose sum is σ = 28495200. Its totient is φ = 14199168.

The previous prime is 21335071. The next prime is 21335101. The reversal of 21335073 is 37053312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21335073 - 2¹ = 21335071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21335071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3888 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (3561900).

Almost surely, 2^21335073 is an apocalyptic number.

It is an amenable number.

21335073 is a deficient number, since it is larger than the sum of its proper divisors (7160127).

21335073 is a wasteful number, since it uses less digits than its factorization.

21335073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 21335073 is about 4618.9904741188. The cubic root of 21335073 is about 277.3520483947.

Adding to 21335073 its reverse (37053312), we get a palindrome (58388385).

The spelling of 21335073 in words is "twenty-one million, three hundred thirty-five thousand, seventy-three".